/************************************************************************
  Scheme interpreter
  
  Copyright (C) 2010 Marioly Garza 

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as
  published by the Free Software Foundation, either version 3 of the
  License, or (at your option) any later version.
  
  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.
  
  You should have received a copy of the GNU Lesser General Public
  License along with this program. If not, see
  <http://www.gnu.org/licenses/>.

************************************************************************/

#ifndef _SCHEME_H_
#define _SCHEME_H_

#include <list>
#include "parser.h"
#include "symbols.h"
#include "util.h"

class scheme
{
    public:
        static symbols *vsymbols;

        static object* evaluate(object* exp, environment* env);

        static object *apply(std::string procedure, pair* arguments, environment *env);

        static int read_input(std::istream* in, std::ostream *out, environment* env);

        static std::list<object*> va_list(pair *args, environment *env, bool eval);
};

#endif
